Aspartic acid is a naturally occurring a-amino acid that contains a carboxylate group in its R group side chain. In the structure below, aspartic acid is drawn in its neutral form with no charged atoms, a form that does not actually exist at any pH. If the pH is gradually increased, what form of aspartic acid exists after one equivalent of base is added to the positively charged form?

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.